A platinum resistance thermometer makes ...

A platinum resistance thermometer makes use of the variation of a conductor with temperature. If the resistance of this thermometer is `5 Omega " at " 20^(@)C " and " 16 Omega` when inserted in a furnace, find the temperature of the furnace. Given `alpha` for the platinum `=0.0036^(@)C`.

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The correct Answer is:

`631^(@)C`

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